How to make an OHC 1.5 AT like a Zen AT with Esteem Engine

This is a discussion on How to make an OHC 1.5 AT like a Zen AT with Esteem Engine within Modifications & Accessories, part of the Under the Hood category; Hi,
I have been driving a Zen AT with an Esteem Engine for the last 3 years and those were ...

I have been driving a Zen AT with an Esteem Engine for the last 3 years and those were the best years of my life. Now i propose to get an OHC 1.5 AT. What can I do to the new car to make it accelerate a little like my old car? I do not want to do complicated stuff since that will mean LOTS of money and more importantly, LOTS OF TIME. Like when i put the esteem engine in the car, it took me a whole year to get everything right, including the suspension, the brakes etc. I also dont want to have any

my budget for the car, and the modifications is about 5 lakhs, which would mean that after the 4.2 for the car, I have about 80K left.

Any suggestions on what I can do, and more importantly where in Chennai I can get it done?